Kostics Enhanced Citaro K is a mod for Bus Simulator 21 that enhances the Mercedes-Benz Citaro K model. This free utility mod improves the bus experience by removing mandatory features such as metallic paint and dirt gradients, allowing for a more customized visual appeal. New LED panels have been added for both the front and sides, as well as interior infotainment displays, enhancing the overall aesthetic and functionality of the bus.

In addition to visual upgrades, the mod introduces several gameplay enhancements. Handholds now respond to steering movements, providing a more realistic driving experience. The bus transmission has been adjusted for improved performance, and a new random bumps feature adds dynamic movement, causing the bus to shift up and down or side to side while driving. This mod requires an additional dependency for optimal functionality.